Is a trailer brake controller necessary equipment?

I am looking into putting a trailer hitch on my truck so that we can move. But I get a little bit confused when the mechanic starts talking about electrical equipment. Do I want a "round 7" or a "flat 4" or both? And is it necessary to also install a trailer brake controller?

The purpose of a truck is to do whatever you ask of it. For a lightweight trailer all you need to connect are the trailer lights, a flat four connector. For bigger trailers you need trailer brakes, a brake controller, and a round seven connector.

You can get a plug-in adapter to go from your round-7 to a flat-4 if you haul a light trailer.
You cannot go from a flat-4 to a round-7 with brakes without re-wiring the truck.

Do it right, do it once.

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Are trailer lights required by law?

I will be traveling cross country with a little trailer behind my vehicle. I have a hitch, but do not have electrical hookups for my hitch. Am I required by law to have working lights on my trailer?

YES it is required

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